Rhagovelia ( Neorhagovelia ) sumatrensis Lundblad, 1933

Rhagovelia ( Neorhagovelia) sumatrensis Lundblad, 1933 View in CoL ( Fig. 1D)

Rhagovelia femorata var. sumatrensis Lundblad, 1933 , 287: 92, Holotype ♂. – Sumatra, Indonesia.

Material examined. 4♂♂, 9♀♀, 12.xiii.2021, Mallela Theeratham waterfalls ( 16°15'56.52''N, 78°51'14.76''E); 3♂♂, 8♀♀, 06.ii.2020, Stream near Pulgampandri ( 19°14'52.8''N, 78°35'28.68''E), J. Deepa & party, leg.

Diagnosis. The average body length of males 2.8 mm, females 3.1 mm. Body entirely black-coloured. Anterior region of pronotum orange brown transverse band, where posterior margin straight. Males have 3–4 spines at the basal half of the mid femur. Males bear 14–18 teeth at the basal half of the hind femur, whereas females have only 3–6 teeth. At the distal half males possess 7–8 teeth, and females with 5–6 teeth. Connexival tip of the female with a short setal tuft.

Distribution. India: Andaman & Nicobar Islands, Chhattisgarh, Madhya Pradesh, Sikkim ( Jehamalar & Chandra, 2016); Telangana ( New record) and West Bengal ( Basu et al., 2018). Elsewhere: Indonesia, Myanmar, Peninsular Malaysia, and South China ( Yang & Polhemus, 1994) ( Fig. 1F).

Remarks. This species may be easily identified by the presence of short, sharp spines ventrally on the basal portion of the male mid-femur and the structure of the male parameres. They are found in floating waters with slow to moderately fast currents and sandy-bottomed streams ( Yang & Polhemus, 1994). In the Kawal Tiger reserve, we collected this species from a roadside, a small sandy stream with a very small amount of water with minimal water current likewise, in the Amrabad Tiger reserve, we collected it beside the waterfalls where the water current was moderate.